input[type='radio'].radio {opacity:0; display:inline-block; height:20px; width: 20px;}
.radio {background:url(imgs/shop_car_unselected@3x.png) no-repeat; height:20px; width: 20px ;background-size:20px 20px
}
input[type='radio'].radio:checked + .radio {background:url(imgs/shop_car_selected@3x.png) no-repeat;background-size:20px 20px;}
